Blanchard Detention Dam X, located in Nashua, Montana, is a gravity dam primarily used for fire protection, stock, and as a small fish pond.
Wind
Humidity
Built in 1960 by the Bureau of Land Management, this federal-owned structure stands at a height of 24 feet with a hydraulic height of 21 feet and a length of 1377 feet. With a maximum storage capacity of 631.5 acre-feet and a normal storage of 104 acre-feet, the dam plays a crucial role in regulating the Willow Creek/Milk River.
Although classified as having a low hazard potential, Blanchard Detention Dam X was assessed to be in unsatisfactory condition during its last inspection in November 2019. The dam's emergency action plan and risk management measures are unclear, posing a moderate risk (3) in the event of a failure. Despite these concerns, the dam has not been modified in recent years and is not under state regulation or jurisdiction. With its unique design featuring buttress and stone cores, Blanchard Detention Dam X serves as a vital structure in the Omaha District, showcasing the importance of water resource management in Montana's Valley County.
Year Completed |
1960 |
Dam Length |
1377 |
River Or Stream |
WILLOW CK./MILK RIVER |
Primary Dam Type |
Gravity |
Surface Area |
59.3 |
Hydraulic Height |
21 |
Drainage Area |
24.1 |
Nid Storage |
631.5 |
Structural Height |
24 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
24 |
| Location | Reservations | Toilets |
|---|---|---|
Duck Creek - Lake Fort Peck
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West End - Lake Fort Peck
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PAULO RESERVOIR
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